How can the teacher’s contradiction in giving extra credit be best explained?

The best explanation for the teacher’s contradiction in giving extra credit lies in valuing the quality of the student's work more than adhering strictly to her belief about extra credit policies. This indicates that the teacher recognized the merit in the student’s efforts and accomplishments, and despite her initial stance on extra credit, she prioritized the student's achievements as deserving recognition. This behavior reflects an understanding that educational practices should sometimes be flexible to account for specific circumstances, particularly when a student demonstrates exceptional work, regardless of previous policies.

This choice encapsulates a nuanced perspective on educational values, where the emphasis on student performance and effort can influence a teacher's decisions, demonstrating a commitment to fostering learning and supporting students in tangible ways.